* {
  margin: 0;
  padding: 0;
}

.app header {
  background-color: red;
  height: 44px;
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  display: flex;
  justify-content: center;
  align-items: center;
}
.app header a {
  width: 57px;
  height: 28px;
  border: 0.0156rem solid black;
  background-color: white;
  border-radius: 0.7813rem 0rem 0rem 0.7813rem;
  text-align: center;
  text-decoration: none;
}
.app header input {
  border: 0.0156rem solid black;
  border-radius: 0rem 0.7813rem 0.7813rem 0rem;
  height: 24px;
  width: calc(100% - 200px);
}
.app main {
  padding: 44px 0;
}
.app main .banner img {
  width: 100%;
}
.app main nav {
  display: flex;
}
.app main nav .icon {
  width: 1em;
  height: 1em;
  vertical-align: -0.15em;
  fill: currentColor;
  overflow: hidden;
}
.app main nav a {
  text-decoration: none;
  flex: 1;
  height: 50px;
  flex-direction: column;
  align-items: center;
  display: flex;
}
.app main nav a svg {
  text-align: center;
  font-size: 30px;
}
.app main nav a span {
  font-size: 14px;
}
.app main .content {
  column-count: 4;
  column-gap: 5px;
  border: 1px solid #e6e6e6;
}
.app main .content div {
  break-inside: avoid;
  margin-bottom: 5px;
}
.app main .content div img {
  width: 100%;
  border-radius: 50%;
  height: 15%;
}
.app main .content div p {
  font: 100 12px/20px "";
  color: #303030;
  padding: 2px 10px;
  text-align: center;
}
.app main .content div .two {
  color: #e6e6e6;
}
.app footer {
  background-color: #fff;
  height: 60px;
  width: 100%;
  position: fixed;
  bottom: 0;
  left: 0;
  display: flex;
  border-top: 1px solid #d6d6d6;
}
.app footer a {
  flex: 1;
  display: flex;
  text-decoration: none;
  width: 50px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: #d6d6d6;
}
.app footer a em {
  font-size: 25px;
}
.app footer a span {
  font-size: 14px;
}
.app footer a:hover {
  color: red;
}